$ git clone -n https://src.fedoraproject.org/rpms/perl-Alien-libmaxminddb.git /var/lib/mock/f42-build-side-1-3499372-45964/root/chroot_tmpdir/scmroot/perl-Alien-libmaxminddb
Cloning into '/var/lib/mock/f42-build-side-1-3499372-45964/root/chroot_tmpdir/scmroot/perl-Alien-libmaxminddb'...
$ git fetch origin d0b0b1d2e89b55a3fd78fdcaf7e80ca517ee3f7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Alien-libmaxminddb
 * [new ref]         d0b0b1d2e89b55a3fd78fdcaf7e80ca517ee3f7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0b0b1d Update to 1.016 (rhbz#2341906)