$ git clone -n https://src.fedoraproject.org/rpms/iguanaIR.git /var/lib/mock/f41-build-785939-13590/root/chroot_tmpdir/scmroot/iguanaIR
Cloning into '/var/lib/mock/f41-build-785939-13590/root/chroot_tmpdir/scmroot/iguanaIR'...
$ git fetch origin b1d6f9ca285237b9f6cd870b406074c6919ebb8e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/iguanaIR
 * [new ref]         b1d6f9ca285237b9f6cd870b406074c6919ebb8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1d6f9c Eliminate use of obsolete %patchN syntax (#2283636)