$ git clone -n https://src.fedoraproject.org/rpms/rust-rand_os.git /var/lib/mock/f39-build-1467850-33740/root/chroot_tmpdir/scmroot/rust-rand_os
Cloning into '/var/lib/mock/f39-build-1467850-33740/root/chroot_tmpdir/scmroot/rust-rand_os'...
$ git fetch origin d3929a0eee0bfbffbde65b69684c6e08d8a61652:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rand_os
 * [new ref]         d3929a0eee0bfbffbde65b69684c6e08d8a61652 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d3929a0 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild