$ git clone -n https://src.fedoraproject.org/rpms/rust-crossbeam.git /var/lib/mock/f39-build-1526199-36059/root/chroot_tmpdir/scmroot/rust-crossbeam
Cloning into '/var/lib/mock/f39-build-1526199-36059/root/chroot_tmpdir/scmroot/rust-crossbeam'...
$ git fetch origin 530a47ecef14e83a74eb465fbe7d39160e18c675:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-crossbeam
 * [new ref]         530a47ecef14e83a74eb465fbe7d39160e18c675 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 530a47e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild