$ git clone -n https://src.fedoraproject.org/rpms/libXISF.git /var/lib/mock/f45-build-15757-479/root/chroot_tmpdir/scmroot/libXISF
Cloning into '/var/lib/mock/f45-build-15757-479/root/chroot_tmpdir/scmroot/libXISF'...
$ git fetch origin 3affc53f7d9f2cc6bc2dcfedd45981cbd03feead:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXISF
 * [new ref]         3affc53f7d9f2cc6bc2dcfedd45981cbd03feead -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3affc53 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild