$ git clone -n https://src.fedoraproject.org/rpms/plasma-mobile.git /var/lib/mock/f39-build-1886724-42783/root/chroot_tmpdir/scmroot/plasma-mobile
Cloning into '/var/lib/mock/f39-build-1886724-42783/root/chroot_tmpdir/scmroot/plasma-mobile'...
$ git fetch origin d7fd3e7ca612bc9ddf915e442f9ff5296867a567:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-mobile
 * [new ref]         d7fd3e7ca612bc9ddf915e442f9ff5296867a567 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d7fd3e7 5.27.9