$ git clone -n https://src.fedoraproject.org/rpms/perl-Paper-Specs.git /var/lib/mock/f41-build-1108015-20090/root/chroot_tmpdir/scmroot/perl-Paper-Specs
Cloning into '/var/lib/mock/f41-build-1108015-20090/root/chroot_tmpdir/scmroot/perl-Paper-Specs'...
$ git fetch origin 44f404ed12c38002f4ae0f92156cc38d73468af0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Paper-Specs
 * [new ref]         44f404ed12c38002f4ae0f92156cc38d73468af0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 44f404e Eliminate use of obsolete %patchN syntax (#2283636)