$ git clone -n https://src.fedoraproject.org/rpms/jblas.git /var/lib/mock/f38-build-side-42-init-devel-618082-26325/root/chroot_tmpdir/scmroot/jblas
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-618082-26325/root/chroot_tmpdir/scmroot/jblas'...
$ git fetch origin e8c6be51bcd1b1068ed7fc486464fbee06a6c477:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jblas
 * [new ref]         e8c6be51bcd1b1068ed7fc486464fbee06a6c477 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e8c6be5 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild