$ git clone -n https://src.fedoraproject.org/rpms/snapshot.git /var/lib/mock/f40-build-744752-111801/root/chroot_tmpdir/scmroot/snapshot
Cloning into '/var/lib/mock/f40-build-744752-111801/root/chroot_tmpdir/scmroot/snapshot'...
$ git fetch origin 58f33f726aaf71af5d5c970714caf613c65e674d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/snapshot
 * [new ref]         58f33f726aaf71af5d5c970714caf613c65e674d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 58f33f7 Fix RHEL build