$ git clone -n https://src.fedoraproject.org/rpms/plasma-workspace.git /var/lib/mock/f39-build-1776915-41525/root/chroot_tmpdir/scmroot/plasma-workspace
Cloning into '/var/lib/mock/f39-build-1776915-41525/root/chroot_tmpdir/scmroot/plasma-workspace'...
$ git fetch origin 08e3a6a25ebd9acac95b5c18d63432e7646a9f65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-workspace
 * [new ref]         08e3a6a25ebd9acac95b5c18d63432e7646a9f65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08e3a6a Bump release and add changelog entry