$ git clone -n https://src.fedoraproject.org/rpms/rust-vec1.git /var/lib/mock/f40-build-2094006-50342/root/chroot_tmpdir/scmroot/rust-vec1
Cloning into '/var/lib/mock/f40-build-2094006-50342/root/chroot_tmpdir/scmroot/rust-vec1'...
$ git fetch origin e2cee79c102a541f6ae4df336d1c5e2885823d07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vec1
 * [new ref]         e2cee79c102a541f6ae4df336d1c5e2885823d07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2cee79 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild