$ git clone -n https://src.fedoraproject.org/rpms/perl-Starman.git /var/lib/mock/f45-build-26250-616/root/chroot_tmpdir/scmroot/perl-Starman
Cloning into '/var/lib/mock/f45-build-26250-616/root/chroot_tmpdir/scmroot/perl-Starman'...
$ git fetch origin c3ac9f08758a4eba915a13a3824582be02dfede4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Starman
 * [new ref]         c3ac9f08758a4eba915a13a3824582be02dfede4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c3ac9f0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild