$ git clone -n https://src.fedoraproject.org/rpms/perl-goto-file.git /var/lib/mock/f45-build-27670-625/root/chroot_tmpdir/scmroot/perl-goto-file
Cloning into '/var/lib/mock/f45-build-27670-625/root/chroot_tmpdir/scmroot/perl-goto-file'...
$ git fetch origin 50d8d009cb355bfb75621fe145f687d116c34ecd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-goto-file
 * [new ref]         50d8d009cb355bfb75621fe145f687d116c34ecd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 50d8d00 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild