$ git clone -n https://src.fedoraproject.org/rpms/reprotest.git /var/lib/mock/f40-build-2032324-47688/root/chroot_tmpdir/scmroot/reprotest
Cloning into '/var/lib/mock/f40-build-2032324-47688/root/chroot_tmpdir/scmroot/reprotest'...
$ git fetch origin 7ebec651043a667dfc10e4c860aa25e823829415:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/reprotest
 * [new ref]         7ebec651043a667dfc10e4c860aa25e823829415 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ebec65 version 0.7.26