$ git clone -n https://src.fedoraproject.org/rpms/rust-uucore_procs.git /var/lib/mock/f40-build-2260717-54418/root/chroot_tmpdir/scmroot/rust-uucore_procs
Cloning into '/var/lib/mock/f40-build-2260717-54418/root/chroot_tmpdir/scmroot/rust-uucore_procs'...
$ git fetch origin 2547e146e6950fbdbf0d12a43bb4cfee88675370:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uucore_procs
 * [new ref]         2547e146e6950fbdbf0d12a43bb4cfee88675370 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2547e14 Update to 0.0.23