$ git clone -n https://src.fedoraproject.org/rpms/openjdk-asmtools.git /var/lib/mock/f39-build-2313744-57721/root/chroot_tmpdir/scmroot/openjdk-asmtools
Cloning into '/var/lib/mock/f39-build-2313744-57721/root/chroot_tmpdir/scmroot/openjdk-asmtools'...
$ git fetch origin 93a190f34a73a34927d6173dfee6969ad21175b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openjdk-asmtools
 * [new ref]         93a190f34a73a34927d6173dfee6969ad21175b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93a190f Forced rebuild