$ git clone -n https://src.fedoraproject.org/rpms/python3.9.git /var/lib/mock/f41-build-835149-158423/root/chroot_tmpdir/scmroot/python3.9
Cloning into '/var/lib/mock/f41-build-835149-158423/root/chroot_tmpdir/scmroot/python3.9'...
$ git fetch origin b5c1ec2e2e16204328d7e74b6abaf8e4e1c6dd92:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python3.9
 * [new ref]         b5c1ec2e2e16204328d7e74b6abaf8e4e1c6dd92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5c1ec2 Require systemtap-sdt-devel for sys/sdt.h