$ git clone -n https://src.fedoraproject.org/rpms/sjinn.git /var/lib/mock/f41-build-1222372-22756/root/chroot_tmpdir/scmroot/sjinn
Cloning into '/var/lib/mock/f41-build-1222372-22756/root/chroot_tmpdir/scmroot/sjinn'...
$ git fetch origin 57749053a7acb8a68600ff1188fc14e4ed4eee34:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sjinn
 * [new ref]         57749053a7acb8a68600ff1188fc14e4ed4eee34 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5774905 Eliminate use of obsolete %patchN syntax (#2283636)