$ git clone -n https://src.fedoraproject.org/rpms/cmconvert.git /var/lib/mock/f45-build-4056-330/root/chroot_tmpdir/scmroot/cmconvert
Cloning into '/var/lib/mock/f45-build-4056-330/root/chroot_tmpdir/scmroot/cmconvert'...
$ git fetch origin d886c4c7110da7fe750ecee79a3683f28cf7c9ae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cmconvert
 * [new ref]         d886c4c7110da7fe750ecee79a3683f28cf7c9ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d886c4c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild