$ git clone -n https://src.fedoraproject.org/rpms/perl-Starlet.git /var/lib/mock/f45-build-26230-616/root/chroot_tmpdir/scmroot/perl-Starlet
Cloning into '/var/lib/mock/f45-build-26230-616/root/chroot_tmpdir/scmroot/perl-Starlet'...
$ git fetch origin 05216d20c62150adf5787f8b85e617d19efe9798:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Starlet
 * [new ref]         05216d20c62150adf5787f8b85e617d19efe9798 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05216d2 Recreated for Fedora