$ git clone -n https://src.fedoraproject.org/rpms/age.git /var/lib/mock/f38-build-side-42-init-devel-1006920-29377/root/chroot_tmpdir/scmroot/age
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1006920-29377/root/chroot_tmpdir/scmroot/age'...
$ git fetch origin 268f06c675bd1e28eab434617f697fdf22669449:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/age
 * [new ref]         268f06c675bd1e28eab434617f697fdf22669449 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 268f06c Update to 1.1.1