$ git clone -n https://src.fedoraproject.org/rpms/flac.git /var/lib/mock/f38-build-727324-100593/root/chroot_tmpdir/scmroot/flac
Cloning into '/var/lib/mock/f38-build-727324-100593/root/chroot_tmpdir/scmroot/flac'...
$ git fetch origin 38fecbc40eb7853fed92da1e637701fb6107db88:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flac
 * [new ref]         38fecbc40eb7853fed92da1e637701fb6107db88 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38fecbc 1.4.3-1