$ git clone -n https://src.fedoraproject.org/rpms/libkscreen.git /var/lib/mock/f40-build-800557-143605/root/chroot_tmpdir/scmroot/libkscreen
Cloning into '/var/lib/mock/f40-build-800557-143605/root/chroot_tmpdir/scmroot/libkscreen'...
$ git fetch origin 0a57425862ed08233d725858a1d93beccda4bf8e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libkscreen
 * [new ref]         0a57425862ed08233d725858a1d93beccda4bf8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a57425 6.0.3