$ git clone -n https://src.fedoraproject.org/rpms/zlib-ng.git /var/lib/mock/f41-build-812367-147813/root/chroot_tmpdir/scmroot/zlib-ng
Cloning into '/var/lib/mock/f41-build-812367-147813/root/chroot_tmpdir/scmroot/zlib-ng'...
$ git fetch origin d93ca1c75c2135d4bb2c6fdfb9d038baf4661e9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zlib-ng
 * [new ref]         d93ca1c75c2135d4bb2c6fdfb9d038baf4661e9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d93ca1c Update to zlib-ng 2.1.7