$ git clone -n https://src.fedoraproject.org/rpms/libselinux.git /var/lib/mock/f41-build-813598-148708/root/chroot_tmpdir/scmroot/libselinux
Cloning into '/var/lib/mock/f41-build-813598-148708/root/chroot_tmpdir/scmroot/libselinux'...
$ git fetch origin ff00f255cbe5c922fa3b564b82cb529dc9198f83:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libselinux
 * [new ref]         ff00f255cbe5c922fa3b564b82cb529dc9198f83 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff00f25 libselinux-3.7-3