$ git clone -n https://src.fedoraproject.org/rpms/sendmail.git /var/lib/mock/f45-build-35820-699/root/chroot_tmpdir/scmroot/sendmail
Cloning into '/var/lib/mock/f45-build-35820-699/root/chroot_tmpdir/scmroot/sendmail'...
$ git fetch origin f6633889d0b7e726a61de030897a235c59d97786:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sendmail
 * [new ref]         f6633889d0b7e726a61de030897a235c59d97786 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f663388 Fixed post scriptlet not to output error about nonexistent clientmqueue