$ git clone -n https://src.fedoraproject.org/rpms/kf5-kmailtransport.git /var/lib/mock/f40-build-788266-135093/root/chroot_tmpdir/scmroot/kf5-kmailtransport
Cloning into '/var/lib/mock/f40-build-788266-135093/root/chroot_tmpdir/scmroot/kf5-kmailtransport'...
$ git fetch origin eb541833847a1de5fb6ad188ecd508199c90a647:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kmailtransport
 * [new ref]         eb541833847a1de5fb6ad188ecd508199c90a647 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb54183 Fix build against KF5 Kgapi