$ git clone -n https://src.fedoraproject.org/rpms/xyzsh.git /var/lib/mock/f45-build-39176-732/root/chroot_tmpdir/scmroot/xyzsh
Cloning into '/var/lib/mock/f45-build-39176-732/root/chroot_tmpdir/scmroot/xyzsh'...
$ git fetch origin d0b754445f405dd871931316ca3e6e3a332f5bf3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xyzsh
 * [new ref]         d0b754445f405dd871931316ca3e6e3a332f5bf3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0b7544 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild