$ git clone -n https://src.fedoraproject.org/rpms/libpreludedb.git /var/lib/mock/f40-build-2702351-70624/root/chroot_tmpdir/scmroot/libpreludedb
Cloning into '/var/lib/mock/f40-build-2702351-70624/root/chroot_tmpdir/scmroot/libpreludedb'...
$ git fetch origin cf7210580cc815b95d15dc9e3f4487a857e6516e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libpreludedb
 * [new ref]         cf7210580cc815b95d15dc9e3f4487a857e6516e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf72105 Properly check valgrind arches