$ git clone -n https://src.fedoraproject.org/rpms/mISDN.git /var/lib/mock/f41-build-750915-13387/root/chroot_tmpdir/scmroot/mISDN
Cloning into '/var/lib/mock/f41-build-750915-13387/root/chroot_tmpdir/scmroot/mISDN'...
$ git fetch origin 183594205899b2f819c2641f7cc37f2b04bcf8cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mISDN
 * [new ref]         183594205899b2f819c2641f7cc37f2b04bcf8cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1835942 Eliminate use of obsolete %patchN syntax (#2283636)