$ git clone -n https://src.fedoraproject.org/rpms/bcunit.git /var/lib/mock/f38-build-side-42-init-devel-877077-28453/root/chroot_tmpdir/scmroot/bcunit
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-877077-28453/root/chroot_tmpdir/scmroot/bcunit'...
$ git fetch origin 322b03454f84edefab3a862003106d645e066c99:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bcunit
 * [new ref]         322b03454f84edefab3a862003106d645e066c99 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 322b034 Remove cmake in source build define. No longer required.