$ git clone -n https://src.fedoraproject.org/rpms/rust-rand_hc0.1.git /var/lib/mock/f39-build-1467826-33737/root/chroot_tmpdir/scmroot/rust-rand_hc0.1
Cloning into '/var/lib/mock/f39-build-1467826-33737/root/chroot_tmpdir/scmroot/rust-rand_hc0.1'...
$ git fetch origin e8284f4c22163908a2d10f9ffa5636663a4b9e71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rand_hc0.1
 * [new ref]         e8284f4c22163908a2d10f9ffa5636663a4b9e71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e8284f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild