$ git clone -n https://src.fedoraproject.org/rpms/xrestop.git /var/lib/mock/f45-build-39122-732/root/chroot_tmpdir/scmroot/xrestop
Cloning into '/var/lib/mock/f45-build-39122-732/root/chroot_tmpdir/scmroot/xrestop'...
$ git fetch origin 6649bce8353f3c6336a163c8f320237361002306:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xrestop
 * [new ref]         6649bce8353f3c6336a163c8f320237361002306 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6649bce Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild