$ git clone -n https://src.fedoraproject.org/rpms/python-alembic.git /var/lib/mock/f39-build-1453470-32883/root/chroot_tmpdir/scmroot/python-alembic
Cloning into '/var/lib/mock/f39-build-1453470-32883/root/chroot_tmpdir/scmroot/python-alembic'...
$ git fetch origin 8ef5cb6e0fe787d56397d7183f88d473c57ea022:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-alembic
 * [new ref]         8ef5cb6e0fe787d56397d7183f88d473c57ea022 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ef5cb6 Update to 1.12.0 (Fixes RHBZ#2236554)