$ git clone -n https://src.fedoraproject.org/rpms/perl-IRI.git /var/lib/mock/f41-build-780074-13558/root/chroot_tmpdir/scmroot/perl-IRI
Cloning into '/var/lib/mock/f41-build-780074-13558/root/chroot_tmpdir/scmroot/perl-IRI'...
$ git fetch origin f10a9244ecc2b4c20fd638d043cbf4e99e3122f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-IRI
 * [new ref]         f10a9244ecc2b4c20fd638d043cbf4e99e3122f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f10a924 Eliminate use of obsolete %patchN syntax (#2283636)