$ git clone -n https://src.fedoraproject.org/rpms/ghc-texmath.git /var/lib/mock/f38-build-side-42-init-devel-1298202-30684/root/chroot_tmpdir/scmroot/ghc-texmath
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1298202-30684/root/chroot_tmpdir/scmroot/ghc-texmath'...
$ git fetch origin 2c2bbba4a6d99212a939a445550b965e98f44740:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-texmath
 * [new ref]         2c2bbba4a6d99212a939a445550b965e98f44740 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c2bbba Convert to %autorelease and %autochangelog