$ git clone -n https://src.fedoraproject.org/rpms/rust-testresult.git /var/lib/mock/f45-build-45448-823/root/chroot_tmpdir/scmroot/rust-testresult
Cloning into '/var/lib/mock/f45-build-45448-823/root/chroot_tmpdir/scmroot/rust-testresult'...
$ git fetch origin 276b0e69e4ea976eb3e573c645900db64dbcf91d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-testresult
 * [new ref]         276b0e69e4ea976eb3e573c645900db64dbcf91d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 276b0e6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild