$ git clone -n https://src.fedoraproject.org/rpms/espresso.git /var/lib/mock/f42-build-864820-172587/root/chroot_tmpdir/scmroot/espresso
Cloning into '/var/lib/mock/f42-build-864820-172587/root/chroot_tmpdir/scmroot/espresso'...
$ git fetch origin 52470b133e419bd7d40c78d449aa2b68354d3664:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/espresso
 * [new ref]         52470b133e419bd7d40c78d449aa2b68354d3664 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52470b1 Rebuild for hdf5 1.14.5