$ git clone -n https://src.fedoraproject.org/rpms/plasma-sdk.git /var/lib/mock/f42-build-side-1-3514725-46091/root/chroot_tmpdir/scmroot/plasma-sdk
Cloning into '/var/lib/mock/f42-build-side-1-3514725-46091/root/chroot_tmpdir/scmroot/plasma-sdk'...
$ git fetch origin 7e3ad711d209d38f3730d7791abda03f6091455c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-sdk
 * [new ref]         7e3ad711d209d38f3730d7791abda03f6091455c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e3ad71 6.3.4