$ git clone -n https://src.fedoraproject.org/rpms/rust-tiger.git /var/lib/mock/f39-build-1455699-32918/root/chroot_tmpdir/scmroot/rust-tiger
Cloning into '/var/lib/mock/f39-build-1455699-32918/root/chroot_tmpdir/scmroot/rust-tiger'...
$ git fetch origin dea8c39afa5e2bd752df232e8ecfde24987f1ab7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tiger
 * [new ref]         dea8c39afa5e2bd752df232e8ecfde24987f1ab7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dea8c39 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild