$ git clone -n https://src.fedoraproject.org/rpms/mono.git /var/lib/mock/f41-build-1303002-23490/root/chroot_tmpdir/scmroot/mono
Cloning into '/var/lib/mock/f41-build-1303002-23490/root/chroot_tmpdir/scmroot/mono'...
$ git fetch origin e18e346346ecc4e3d5bbf8a4e01f0aa613a09125:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mono
 * [new ref]         e18e346346ecc4e3d5bbf8a4e01f0aa613a09125 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e18e346 Correct the selection of alloc/free functions for zlib. (as in PR #21759 upstream) [2]