$ git clone -n https://src.fedoraproject.org/rpms/dnf-plugins-core.git /var/lib/mock/f41-build-side-1-2634191-26013/root/chroot_tmpdir/scmroot/dnf-plugins-core
Cloning into '/var/lib/mock/f41-build-side-1-2634191-26013/root/chroot_tmpdir/scmroot/dnf-plugins-core'...
$ git fetch origin 43bbd2e9826d323c91c4d39f87656c60f222943a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dnf-plugins-core
 * [new ref]         43bbd2e9826d323c91c4d39f87656c60f222943a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43bbd2e Update to 4.9.0