$ git clone -n https://src.fedoraproject.org/rpms/perl-Mango.git /var/lib/mock/f41-build-1053471-19286/root/chroot_tmpdir/scmroot/perl-Mango
Cloning into '/var/lib/mock/f41-build-1053471-19286/root/chroot_tmpdir/scmroot/perl-Mango'...
$ git fetch origin 0db38ffc4486214aa2ac5f560d8257966fa1fade:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Mango
 * [new ref]         0db38ffc4486214aa2ac5f560d8257966fa1fade -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0db38ff Eliminate use of obsolete %patchN syntax (#2283636)