$ git clone -n https://src.fedoraproject.org/rpms/rust-bit-set.git /var/lib/mock/f39-build-1455100-32912/root/chroot_tmpdir/scmroot/rust-bit-set
Cloning into '/var/lib/mock/f39-build-1455100-32912/root/chroot_tmpdir/scmroot/rust-bit-set'...
$ git fetch origin d3fe02a0140710cda48a810eb5c3af9a28937bc1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bit-set
 * [new ref]         d3fe02a0140710cda48a810eb5c3af9a28937bc1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d3fe02a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild