$ git clone -n https://src.fedoraproject.org/rpms/xa.git /var/lib/mock/f45-build-38587-725/root/chroot_tmpdir/scmroot/xa
Cloning into '/var/lib/mock/f45-build-38587-725/root/chroot_tmpdir/scmroot/xa'...
$ git fetch origin 5da29e7299b2542f54aa7871272158dba9b14b60:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xa
 * [new ref]         5da29e7299b2542f54aa7871272158dba9b14b60 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5da29e7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild