$ git clone -n https://src.fedoraproject.org/rpms/libtraceevent.git /var/lib/mock/f45-build-17143-496/root/chroot_tmpdir/scmroot/libtraceevent
Cloning into '/var/lib/mock/f45-build-17143-496/root/chroot_tmpdir/scmroot/libtraceevent'...
$ git fetch origin 1c03f0417944111143d17a8bcc127f0dc2398308:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libtraceevent
 * [new ref]         1c03f0417944111143d17a8bcc127f0dc2398308 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c03f04 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild