$ git clone -n https://src.fedoraproject.org/rpms/kf5-akonadi-calendar.git /var/lib/mock/f38-build-side-42-init-devel-580860-26034/root/chroot_tmpdir/scmroot/kf5-akonadi-calendar
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-580860-26034/root/chroot_tmpdir/scmroot/kf5-akonadi-calendar'...
$ git fetch origin 9298c70d62d21bb72768eb2bf21c1de6b4161a9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-akonadi-calendar
 * [new ref]         9298c70d62d21bb72768eb2bf21c1de6b4161a9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9298c70 Rebuild (grantlee-qt5)