$ git clone -n https://src.fedoraproject.org/rpms/perl-Alien-CFITSIO.git /var/lib/mock/f42-build-3182230-40950/root/chroot_tmpdir/scmroot/perl-Alien-CFITSIO
Cloning into '/var/lib/mock/f42-build-3182230-40950/root/chroot_tmpdir/scmroot/perl-Alien-CFITSIO'...
$ git fetch origin bb4a4e557e357a22397036c25b78388909c930a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Alien-CFITSIO
 * [new ref]         bb4a4e557e357a22397036c25b78388909c930a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb4a4e5 Orphaned for 6+ weeks