$ git clone -n https://src.fedoraproject.org/rpms/perl-Parse-Gitignore.git /var/lib/mock/f45-build-25669-612/root/chroot_tmpdir/scmroot/perl-Parse-Gitignore
Cloning into '/var/lib/mock/f45-build-25669-612/root/chroot_tmpdir/scmroot/perl-Parse-Gitignore'...
$ git fetch origin 7181da4a98ccb58885684b99cfabe6d26ee7eb12:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Parse-Gitignore
 * [new ref]         7181da4a98ccb58885684b99cfabe6d26ee7eb12 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7181da4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild