$ git clone -n https://src.fedoraproject.org/rpms/umbrello.git /var/lib/mock/f40-build-2673251-67597/root/chroot_tmpdir/scmroot/umbrello
Cloning into '/var/lib/mock/f40-build-2673251-67597/root/chroot_tmpdir/scmroot/umbrello'...
$ git fetch origin fc34b70c5678e9c6a596f1e3512f157e6d405d38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/umbrello
 * [new ref]         fc34b70c5678e9c6a596f1e3512f157e6d405d38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc34b70 24.02.1