$ git clone -n https://src.fedoraproject.org/rpms/altermime.git /var/lib/mock/f41-build-1120153-20264/root/chroot_tmpdir/scmroot/altermime
Cloning into '/var/lib/mock/f41-build-1120153-20264/root/chroot_tmpdir/scmroot/altermime'...
$ git fetch origin 79790fc2e1de558816a6f03fdbc253c8b289eb13:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/altermime
 * [new ref]         79790fc2e1de558816a6f03fdbc253c8b289eb13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79790fc Eliminate use of obsolete %patchN syntax (#2283636)