$ git clone -n https://src.fedoraproject.org/rpms/rust-num-rational0.3.git /var/lib/mock/f39-build-1522124-35886/root/chroot_tmpdir/scmroot/rust-num-rational0.3
Cloning into '/var/lib/mock/f39-build-1522124-35886/root/chroot_tmpdir/scmroot/rust-num-rational0.3'...
$ git fetch origin c29d127a7773dd71b4f83608ba0c2da8d71242f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-num-rational0.3
 * [new ref]         c29d127a7773dd71b4f83608ba0c2da8d71242f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c29d127 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild