$ git clone -n https://src.fedoraproject.org/rpms/kmines.git /var/lib/mock/f40-build-1855972-24984/root/chroot_tmpdir/scmroot/kmines
Cloning into '/var/lib/mock/f40-build-1855972-24984/root/chroot_tmpdir/scmroot/kmines'...
$ git fetch origin f30d70700f506a739b1f1d7b35d033e4d25500b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmines
 * [new ref]         f30d70700f506a739b1f1d7b35d033e4d25500b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f30d707 24.05.2