$ git clone -n https://src.fedoraproject.org/rpms/rust-vec_map.git /var/lib/mock/f39-build-1455849-32920/root/chroot_tmpdir/scmroot/rust-vec_map
Cloning into '/var/lib/mock/f39-build-1455849-32920/root/chroot_tmpdir/scmroot/rust-vec_map'...
$ git fetch origin 1a5ccdb5d5e38289632c6f129f058391405274ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vec_map
 * [new ref]         1a5ccdb5d5e38289632c6f129f058391405274ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a5ccdb Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild