$ git clone -n https://src.fedoraproject.org/rpms/gtkspell.git /var/lib/mock/f45-build-13186-447/root/chroot_tmpdir/scmroot/gtkspell
Cloning into '/var/lib/mock/f45-build-13186-447/root/chroot_tmpdir/scmroot/gtkspell'...
$ git fetch origin 15cd78310326e1e0099c9b87ea53a8ff1f7bf49f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtkspell
 * [new ref]         15cd78310326e1e0099c9b87ea53a8ff1f7bf49f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15cd783 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild