$ git clone -n https://src.fedoraproject.org/rpms/xtl.git /var/lib/mock/f45-build-39154-732/root/chroot_tmpdir/scmroot/xtl
Cloning into '/var/lib/mock/f45-build-39154-732/root/chroot_tmpdir/scmroot/xtl'...
$ git fetch origin e8cb197bfdf5534be63994fd670b10b0ba92a4f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xtl
 * [new ref]         e8cb197bfdf5534be63994fd670b10b0ba92a4f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e8cb197 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild