$ git clone -n https://src.fedoraproject.org/rpms/mariadb-connector-c.git /var/lib/mock/f45-build-18026-507/root/chroot_tmpdir/scmroot/mariadb-connector-c
Cloning into '/var/lib/mock/f45-build-18026-507/root/chroot_tmpdir/scmroot/mariadb-connector-c'...
$ git fetch origin fd3c7f39bbe157c26b26ea46e7ed96c29b04edc6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mariadb-connector-c
 * [new ref]         fd3c7f39bbe157c26b26ea46e7ed96c29b04edc6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd3c7f3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild