$ git clone -n https://src.fedoraproject.org/rpms/tin.git /var/lib/mock/f40-build-780176-130701/root/chroot_tmpdir/scmroot/tin
Cloning into '/var/lib/mock/f40-build-780176-130701/root/chroot_tmpdir/scmroot/tin'...
$ git fetch origin 7c9ffc78ff51095958a840a60e5358affc0c111f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tin
 * [new ref]         7c9ffc78ff51095958a840a60e5358affc0c111f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c9ffc7 Rebuild for ICU 74