$ git clone -n https://src.fedoraproject.org/rpms/rust-sha1collisiondetection.git /var/lib/mock/f39-build-1517141-35689/root/chroot_tmpdir/scmroot/rust-sha1collisiondetection
Cloning into '/var/lib/mock/f39-build-1517141-35689/root/chroot_tmpdir/scmroot/rust-sha1collisiondetection'...
$ git fetch origin b1a26ace2f0088371aa97e71519a06574d817543:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sha1collisiondetection
 * [new ref]         b1a26ace2f0088371aa97e71519a06574d817543 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1a26ac Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild