$ git clone -n https://src.fedoraproject.org/rpms/rust-num-bigint0.3.git /var/lib/mock/f39-build-1517132-35689/root/chroot_tmpdir/scmroot/rust-num-bigint0.3
Cloning into '/var/lib/mock/f39-build-1517132-35689/root/chroot_tmpdir/scmroot/rust-num-bigint0.3'...
$ git fetch origin 51a53e19ed1e0e72221f51744e06d8617ad596fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-num-bigint0.3
 * [new ref]         51a53e19ed1e0e72221f51744e06d8617ad596fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51a53e1 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild