$ git clone -n https://src.fedoraproject.org/rpms/rubygem-actionview.git /var/lib/mock/f43-build-side-115215-61077986-6588720/root/chroot_tmpdir/scmroot/rubygem-actionview
Cloning into '/var/lib/mock/f43-build-side-115215-61077986-6588720/root/chroot_tmpdir/scmroot/rubygem-actionview'...
$ git fetch origin 7b0225c797d7f0b889e75d858268727eedbcfd39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-actionview
 * [new ref]         7b0225c797d7f0b889e75d858268727eedbcfd39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b0225c Update to Action View 8.0.2.