$ git clone -n https://src.fedoraproject.org/rpms/plasma-activities.git /var/lib/mock/f40-build-1495473-23854/root/chroot_tmpdir/scmroot/plasma-activities
Cloning into '/var/lib/mock/f40-build-1495473-23854/root/chroot_tmpdir/scmroot/plasma-activities'...
$ git fetch origin f4152247747c038b74ed7efcd3c59c2266e4d5f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-activities
 * [new ref]         f4152247747c038b74ed7efcd3c59c2266e4d5f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f415224 6.1.2