$ git clone -n https://src.fedoraproject.org/rpms/rust-ff.git /var/lib/mock/f40-build-2036345-48021/root/chroot_tmpdir/scmroot/rust-ff
Cloning into '/var/lib/mock/f40-build-2036345-48021/root/chroot_tmpdir/scmroot/rust-ff'...
$ git fetch origin 5745f675de2e02b6687489211a93a2c155e5dc05:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ff
 * [new ref]         5745f675de2e02b6687489211a93a2c155e5dc05 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5745f67 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild