$ git clone -n https://src.fedoraproject.org/rpms/rubygem-activejob.git /var/lib/mock/f43-build-side-115215-61077564-6588690/root/chroot_tmpdir/scmroot/rubygem-activejob
Cloning into '/var/lib/mock/f43-build-side-115215-61077564-6588690/root/chroot_tmpdir/scmroot/rubygem-activejob'...
$ git fetch origin dd8f65637ebc3494df3bcf1dffd355145069fc28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-activejob
 * [new ref]         dd8f65637ebc3494df3bcf1dffd355145069fc28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd8f656 Update to Action Job 8.0.2.