$ git clone -n https://src.fedoraproject.org/rpms/kgamma.git /var/lib/mock/f40-build-796036-140456/root/chroot_tmpdir/scmroot/kgamma
Cloning into '/var/lib/mock/f40-build-796036-140456/root/chroot_tmpdir/scmroot/kgamma'...
$ git fetch origin 38e56039242d18f60fe9661d191b799bb7830514:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kgamma
 * [new ref]         38e56039242d18f60fe9661d191b799bb7830514 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38e5603 6.0.2