$ git clone -n https://src.fedoraproject.org/rpms/kgamma.git /var/lib/mock/f40-build-2392998-60531/root/chroot_tmpdir/scmroot/kgamma
Cloning into '/var/lib/mock/f40-build-2392998-60531/root/chroot_tmpdir/scmroot/kgamma'...
$ git fetch origin cbb41857dca91eb7adda8995ab08642ad479d71c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kgamma
 * [new ref]         cbb41857dca91eb7adda8995ab08642ad479d71c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cbb4185 5.93.0