$ git clone -n https://src.fedoraproject.org/rpms/python-sqlalchemy.git /var/lib/mock/f38-build-729931-101947/root/chroot_tmpdir/scmroot/python-sqlalchemy
Cloning into '/var/lib/mock/f38-build-729931-101947/root/chroot_tmpdir/scmroot/python-sqlalchemy'...
$ git fetch origin bb52e5c512a51c33439568ed56aecf2d737be970:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sqlalchemy
 * [new ref]         bb52e5c512a51c33439568ed56aecf2d737be970 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb52e5c Version 1.4.49