$ git clone -n https://src.fedoraproject.org/rpms/rust-rxml.git /var/lib/mock/f45-build-44675-816/root/chroot_tmpdir/scmroot/rust-rxml
Cloning into '/var/lib/mock/f45-build-44675-816/root/chroot_tmpdir/scmroot/rust-rxml'...
$ git fetch origin d52b3d1a41ed014d90f1d70d5163375610f474e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rxml
 * [new ref]         d52b3d1a41ed014d90f1d70d5163375610f474e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d52b3d1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild