$ git clone -n https://src.fedoraproject.org/rpms/rust-pear.git /var/lib/mock/f45-build-43742-805/root/chroot_tmpdir/scmroot/rust-pear
Cloning into '/var/lib/mock/f45-build-43742-805/root/chroot_tmpdir/scmroot/rust-pear'...
$ git fetch origin 9e22f917f11919c60c20d81f3b7e2899fb751ace:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pear
 * [new ref]         9e22f917f11919c60c20d81f3b7e2899fb751ace -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e22f91 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild