$ git clone -n https://src.fedoraproject.org/rpms/kpmcore.git /var/lib/mock/f40-build-2243172-53669/root/chroot_tmpdir/scmroot/kpmcore
Cloning into '/var/lib/mock/f40-build-2243172-53669/root/chroot_tmpdir/scmroot/kpmcore'...
$ git fetch origin 298b8d2d4b8b62fc816bf9e32dd3536e8181a04c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kpmcore
 * [new ref]         298b8d2d4b8b62fc816bf9e32dd3536e8181a04c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 298b8d2 24.01.90