$ git clone -n https://src.fedoraproject.org/rpms/rust-gobject-sys.git /var/lib/mock/f45-build-42037-788/root/chroot_tmpdir/scmroot/rust-gobject-sys
Cloning into '/var/lib/mock/f45-build-42037-788/root/chroot_tmpdir/scmroot/rust-gobject-sys'...
$ git fetch origin 743607461204298c16a2d1212febbf4c1405cf47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gobject-sys
 * [new ref]         743607461204298c16a2d1212febbf4c1405cf47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7436074 Update to version 0.22.9; Fixes RHBZ#2526049