$ git clone -n https://src.fedoraproject.org/rpms/sendmail.git /var/lib/mock/f42-build-side-1-3536487-46558/root/chroot_tmpdir/scmroot/sendmail
Cloning into '/var/lib/mock/f42-build-side-1-3536487-46558/root/chroot_tmpdir/scmroot/sendmail'...
$ git fetch origin fd4615c40d72fb8ef36cc6cbadd62008079f3454:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sendmail
 * [new ref]         fd4615c40d72fb8ef36cc6cbadd62008079f3454 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd4615c Fixed alternative scripts for /usr/(s)bin merge