$ git clone -n https://src.fedoraproject.org/rpms/python-zstd.git /var/lib/mock/f42-build-side-1-3500261-45970/root/chroot_tmpdir/scmroot/python-zstd
Cloning into '/var/lib/mock/f42-build-side-1-3500261-45970/root/chroot_tmpdir/scmroot/python-zstd'...
$ git fetch origin 8af2c62283fb2253b24b7d824e14fa13ed518699:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-zstd
 * [new ref]         8af2c62283fb2253b24b7d824e14fa13ed518699 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8af2c62 Update to 1.5.6.7; Fixes: RHBZ#2339003