$ git clone -n https://src.fedoraproject.org/rpms/bomber.git /var/lib/mock/f42-build-side-1-3562215-46722/root/chroot_tmpdir/scmroot/bomber
Cloning into '/var/lib/mock/f42-build-side-1-3562215-46722/root/chroot_tmpdir/scmroot/bomber'...
$ git fetch origin 678446ad63e7919e68257cb4c73861dcc080ff5e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bomber
 * [new ref]         678446ad63e7919e68257cb4c73861dcc080ff5e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 678446a 25.04.2