$ git clone -n https://src.fedoraproject.org/rpms/kexec-tools.git /var/lib/mock/f42-build-867453-175505/root/chroot_tmpdir/scmroot/kexec-tools
Cloning into '/var/lib/mock/f42-build-867453-175505/root/chroot_tmpdir/scmroot/kexec-tools'...
$ git fetch origin 768af19c31414e92680403d48a0b1bf5f2568028:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kexec-tools
 * [new ref]         768af19c31414e92680403d48a0b1bf5f2568028 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 768af19 Rebuilt for the bin-sbin merge (2nd attempt)