$ git clone -n https://src.fedoraproject.org/rpms/plasma-sdk.git /var/lib/mock/f41-build-824536-154178/root/chroot_tmpdir/scmroot/plasma-sdk
Cloning into '/var/lib/mock/f41-build-824536-154178/root/chroot_tmpdir/scmroot/plasma-sdk'...
$ git fetch origin d64cb3be7747d09def4f53c406d57409bd990a2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-sdk
 * [new ref]         d64cb3be7747d09def4f53c406d57409bd990a2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d64cb3b rebuild