$ git clone -n https://src.fedoraproject.org/rpms/rust-ab_glyph.git /var/lib/mock/f42-build-61095791-6588810/root/chroot_tmpdir/scmroot/rust-ab_glyph
Cloning into '/var/lib/mock/f42-build-61095791-6588810/root/chroot_tmpdir/scmroot/rust-ab_glyph'...
$ git fetch origin 3b87ae5906a1e3805c8d92059e8e15e34a961044:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ab_glyph
 * [new ref]         3b87ae5906a1e3805c8d92059e8e15e34a961044 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b87ae5 Update to version 0.2.31; Fixes RHBZ#2375410