$ git clone -n https://src.fedoraproject.org/rpms/python-sqlalchemy.git /var/lib/mock/f39-build-1934737-43117/root/chroot_tmpdir/scmroot/python-sqlalchemy
Cloning into '/var/lib/mock/f39-build-1934737-43117/root/chroot_tmpdir/scmroot/python-sqlalchemy'...
$ git fetch origin 4c5ef9f40e3348b4af72da5888df7f2bd821fd63:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sqlalchemy
 * [new ref]         4c5ef9f40e3348b4af72da5888df7f2bd821fd63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c5ef9f Patch to accept “too low” aiomysql version