$ git clone -n https://src.fedoraproject.org/rpms/kexec-tools.git /var/lib/mock/f41-build-858653-168467/root/chroot_tmpdir/scmroot/kexec-tools
Cloning into '/var/lib/mock/f41-build-858653-168467/root/chroot_tmpdir/scmroot/kexec-tools'...
$ git fetch origin 23e0e44579f8eeeadf9c9509865ccd6b6f7a494c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kexec-tools
 * [new ref]         23e0e44579f8eeeadf9c9509865ccd6b6f7a494c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23e0e44 Update to 2.0.29 upstream release