$ git clone -n https://src.fedoraproject.org/rpms/python-httpcore.git /var/lib/mock/f40-build-2418439-60580/root/chroot_tmpdir/scmroot/python-httpcore
Cloning into '/var/lib/mock/f40-build-2418439-60580/root/chroot_tmpdir/scmroot/python-httpcore'...
$ git fetch origin 97c8e7c418f1e3d431f0109cf02e60469e4c4482:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-httpcore
 * [new ref]         97c8e7c418f1e3d431f0109cf02e60469e4c4482 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 97c8e7c Update to latest upstream release (closes rhbz#2249058)